关键词: 液压控制, 分支井, 井下控制阀

Abstract:

The feasibility of double column entering in the deep

branch well is very low because of the high temperature and pressure，how to use the unitary column realizing intelligent control of commingled production of deep branch well is important research direction of study and unceasing improvement at home and abroad.The oil extraction is realized intelligent control of commingled production.This column has not only realized the branch selective mining from the branch well and the intelligent commingled production，but can also be used to effectively resolve the domestic oil extraction of the branch well that is confronted with several technology problems，i.e.，effectively resolve the problem of disturbance and channeling interbranch well，ensure that the productivity of every branch well is bought in full play and provide the technology hold for branch well to extract fracture and poretype reservoirs，no need to run a specialized test tool and blank off tool and find out the branch producing water，as to effectively blank off the branch，be able to meet the need of the high temperature and high pressure well，provide the technology hold for branch well to extract deeper oil.

Key words: hydraulic control, branch well, bottom hole pilot valve 